It all comes down to something that rhymes with thing.

Cling!

Has he ever exhibited any kind of cling? Ever noticed any kind of reluctance in him to leave after the deed, or even a hint of jealousy if your weekend plans might introduce another male into the picture? It doesn’t mean that you are assured of girlfriend potential in his eyes, but it lets you know that he has more than one thing on his mind. Of course he might just be possessive of his never fail avenue to a few hours of fun, but then again he might have taken an interest in something beyond your bodily enchantments.

From that stage you have two options. No sudden movements, or take no prisoners. In no sudden movements your challenge is to slowly unravel his behaviour to see if he’s just trying to guard his “property”, or if he’s genuinely interested in you. I understand the lure of emotion and romance, but just remember how you two started out! Make sure you use some objectivity, but not too much, analysis paralysis isn’t any good either. In take no prisoners you can be more upfront with him. It won’t take as long to figure out where he stands but be prepared for male dramatics if you’ve misread him.